Registering mechanism for liquid-tanks.



C. EBER'HART. Jn; & S. MAZUR. HEGISTEHINGYMECHANISMFOR LIQUID .TANKSJ` APPLICAWQN min umso. |915. Y n

` e SHEETS-sufra.

.l lllllnlllllm TANK LEVEL `C. EBERHARTfIn. & S. MAZUR. REGISTERING MECHANISM FOR LIQUID TANKS. n Patented 0m15.191s.

`6 SHEETS-r-SHEET 6.

APPLICATION rlLEn nc.so."|a1s.

UNITED sTArrEs Param OFFICE.

CLEBUBNE EBERHART, JB., AND SAMUEL HAZUB, BIUFFALO, NEW YORK; -SAIDl MAZUR ASSIGNOR TO SAID EBERHART. v u

`IillGrIS'lBING MECHANISM FOR LIQUID-TANKS.

To H whom 'it may conce-rn.'

Be it known that we, GLniiUiixE Enric ii-airr, Jr., and SAMUEL Maxon, citizensl of the United States, residing at Buffalo, in the county of Erie and State of New York, have invented new and usefulImprovements in Re istering MechanismtorLiquidTanks, of which thefollowiiig is a specification.

This invention relatesl generally to a mechanism for registering the total amount l of liquid which has been introduced into'the.

tank,`also the amount of liquid which has` been removed from the tank and also the amountot liquid which is still present at any particular time in the tank. A device ot this character capable of'various uses, fdr instanciay in "connection with theV gasoleiie tank of an automobile for determining the amount of gasolenc which is introducei'l into the tank tl'iroughout a season or prevale'- termined period during which the car is operated, alsoto indicate the amount otl gasolene which may he used onsonie particular trip. and also to indicate the amount of gasolene which is still on hand at any )articular time in the tank. This indicatingr mechanism enables the operator ot an automobile or similar vehicle, such as a motor boat, to calcula-te the cost ot' ruiming` the vehicle for any particular season. and also enables the driver to inform himself as to the quantityotgasolene required toia par ticular trip, so that a suttieient, supply is taken `aboard at -the proper time', and also informsl the driver as to the amount of gasolene on hand so that he can replenish the `same".wlien necessary and thereby7 avoid running out of g'asolene atan inopportuiie time.

'l`he objectof this invention is to provide an indicating mechanism ot' this character in which yimproved means are provided`v for Ielectricallytransmitting the movement of the parts which are responsve'to variations in the height `ot gasolene in` thetank to .the various registering devices which are arranged lremote trom the tank and adjacent to the placefnsu'ally' occupied by the dri ver` whichelectrical transl'iiittiiig means are so organized that the production of sparks adjacent` to ,the gasolene tank is avoided and ignition-0f any gasolene vapors which Amay he present in that locality is therefore rendered 4irnpos'sihle.` In carrying out the purxposef ofthis invention various improvements Specification of Letters Patent.

in details of construction have been' pro'- vided as will'be hereinafter n'iore fully'fdescribed. i' In the accompanying drawings:

Figure lis a fragmentary` vertical section of a gasolene tank provldedi with-that portion of our improved indicating-mecha- 10-1()` Fig. 1. Fig 11' is a fragmentaryv Patented oct.' 15,1918. Application led December 30` 1915. Serial No. 89,357. i i i. i l

d F ig. 10 is a horizontal section "taken on-line tertical sectionta'iken on line 11e-11, Fig.

and showing-one of the retaining dogsiriits operative position. Flgfl-Qisa front view,

on an enlarged scale, of "the register-ing`de` vices which indicate "thetotal amount, of gasolene-supplied tothe tank 'from time Ato' time, the amount ot `ega'solene taken from the t tank during a particular trip, and also the amount4 of gasolene still on hand. Fig. 13 is a rear elevation ofthe saine. Fig. 14 is a top plan view 'of the-same. Figsl; 16 and 1T are vertical transverse sections taken on the correspondinglvv ii'uii'ibfered"line/sy ih Fig. 13. Fig. 1S is a tragmentary\verticaldon#l g-itudnal section talkeiifo'n linelSQ-IS', Fig.'4 14. Fig. 19 is .a horizontal] section-taken on line 19 19. Fig. 1'?.` Fig'.` 20is a detached top plan view ofthe tank"registeringdial wheel and associated part are fragmentarv"7 vertical transverse taken on linesvZl-Ql and 22-22, Fi

spectively. Fig. is. a diagrammatic per-4 spective view showing the' elect-rie circuitsv between the float operated mechanism and devices.

Siiiiilar characters of reference the operating mechanism of` the registering indica-te 5 correspoi'idingo= parts throughout the several tank is usually constructed in the form of Figs." 21 and '105 ed to contain -theisiipply ot' gasolene4 or operating the engieof 'the motor Vear. This so that it will rise and fall with the gasoav lene in the tank as the level of the lattervaries, this movement of the float being utilized to operate the switches of electrical oircuits associated with devices which operate the dial mechanisms adjacent to the place or compartment' usually occupied by 'the driver, so that the latter may readily observe the condition of his gasolene suppl and the amount which has been. lconsume This lioat may be constructed' in any suitw able manner butas shown in Figs. 1 and 10 the same is preferably constructed of sheet metal inithe form of a hollow body which is sufliciently buoyant that the same will ride on to of the gasolene in the tank and rise and all With the latter as the level of thc gasolene within the tank changes. In order to enable a practically true register to be obtained as to` the amount of gasolene in the tank, particularly when the same is empty, or nearly s'o tliebottom or lower side of the tank is provided w-ith a downwardly projectingpocketwhich is-adapted to receive the fioat in its lowermols't position. of vthis pocket is substantially equal to the height of,.the float so that when the tankis completely emptied and the float is in itsvv lowest position within the pocket the bottom or lower side of the tank will be flush withl the top of the float, or substantially so, andthus enable the position of the float within the tankto be utilized for obtaining an accurate indication on the dial'mechanismnssociated therewithfor properly determining the amount of gasolene which is on hand within the tank.

In order to prevent the Waves due to agitation or s'washing of the gasolene in the tank from bobbing the floatl up and down and thus improperly operate the dial mechanism to an undueexteiit, which otherwise would be liable to occur, a guard 4 is provided which is'arrangedaround the space which is 4traversed by the float during its rising and falling movement and separates this'space from the remaining part of the space within 'the gasol'ene tank,`so that-an undue fluctuation in the level of the main part of the gasolene in the 'tank will not unduly influence the.. level of that part of the' gasolene upon which the float rests. In its preferred form this guard is constructed" in the form ofa cylinder which is arl-an ed inan upright position within the tan and extends from thebottom of the pocket 3 to the top of the tank'aroun'd the \-'ertical..path 'of the float. At its lower end this guard is pro# vided with notcheso'r openings 5 which permit Vthe gasolene to freely enter -and -leaye the space within `the guard, so as'kto'mainv.the gasolene tank.

preferably secured at its vlower end to the The depth tain a uniform level of the gasolene t'hrou h- .out the' tankf'as the same rises and fa ls. the fica-t riseswand fallsthe same is guided so that itis held against turning about a vertical vaxis for which purpose it is preferable to employ two upright guide rods G, 6 arranged parallel and on opposite sides of the axis of the fioat. the latter being provided with guideways or openings 7, 7 n ear its margin which receive said guide rods and enable the float to slide vertically thereon as the latter rises and falls in response to the variations in the level of the gasolene. These guide rods are sccuredgat their lower ends to a cross bar 8 and at their" upper ends to a supporting plate 9 which is removably secured over an opening 10 in the top of Theguard cylinder is lower cross ba'r 8 by niean'sof screws 11 and its upper end bears'ag'ainstthe underside of the supporting plate 9.

12 represents an upright spiral constructed by twisting a strip of sheet metal or similar material about a vertical axis so that the same is very light. This spiral is pivotally supported at its upper and lower ends `and passes with its intermediate part throughv a slot 13 formed in'the central part of the-floatso that the latter upon rising and fallin will' cause the Spiral to turn. hori zontalply in' one directionor theother. In the following explanation it. will be assumed thatwhen the float rises and turns the spiral vthis movement of the latter will be regarded as in the forwarddirection while the-movement due to the descent of the float will be regarded as in the backward direction. As shown in Fig. 1, the means. for pivotally supporting the spiral at its lower end cornprise a pivot pin 14 projecting downwardly f connected with -the upper end of the-'spiral andwhich isujournaled near its lower end'in a lower bearing 16 arranged on the adjacent part of the 'supporting plate 9.wh'ile the upper end ofthis shaft is journaled -in a bearing 17 formed in the central art of a' horizontal bar 18 forming part' o a'fraine which is secured to the outer side of the supporting plate 9 in' any suitable manner.

'Inorde-r to obtain amaxmum accuracyin the operation of the'float mechanism and the dial mechanism associated therewith so as to correctly indicate the amount of gasolene which is introduced into the tank or re-A moved@ therefrom, it is necessary for the' float' andspiral lto operate upon each other with a :minimum of friction a-nd in .order lto 'attain this result the upper end of thel to-transinit movement to theflatterwithout producingan undue frictional yresistance be-` tweenthe spiraland thedrivingshaft or bei` block *is arranged within an annular socket 22`fon"`the` un by` means of a horizontal pivot pin 24pass-y ing through the lower endfof the couplingy is shi tween the spiral (and the `float; In its preferred form,l asshow'n in Figs. 1 and 2, thisy universal joint comprises fa coupling block 19 lprovided at l'its upper and lower ends wit open upwardly i and downwardly respectively anelfare arranged at right angles to eacl'ifother?r` The upper end ofthis couplingv erside' of the lower" bearing loffthedriving shaft and the. u` per notch of this-block receivesloosely'a at key 23 arranged diametrically on thelowei'end of the driving shaft, while ythe,` lower notch 'of y this block' receives the upper 'end of the spiral andis" pivotallyconnected therewith block andthe upperend of rthe spiral and arranged at right angles tothe lower notch of thisI block. By this means the upper end of thespiral may be dis lacedlaterally to a limitedv extent relatively to the driving shaft 15 and still pro erly` transmit motion from the spiral `toy t is shaft as the float rises and falls without causing the float'to' I bind on the spiral or cramping the -connec l y y y p n l y y A y y ng() extendingover the ruine bar A18 and y a ap-ted to form a" casing or in'closure for' y tion between the spiraland the' driving shaft which otherwise would reduce the sensitiveness of the `float mechanism and result in an inaccurate registration of -thegasolene supply 'and delivery` andthe amountfof` gasolene if on" hand'.

` Whena paratus is "installedy on an. y automobileoi-"similar vehicle which is liable" l 45,

tofbeftiltedsidewise or "forwardl vand back-v wardl'fthe'rlevel'of the liquid 1n the tank ed Arweslatively to the top and bottom of the tank without producing an varia` tion in the actual particularl liable tol occur 4in the' case of an `antonio ile when the `same` istraveling 1 y es over alroadway'having a lhigh' crownjor," aI roadway runn1ng over hills and 'through valleys; When an .automobile passes `j from theel-own to thejgaaer of the street in jorder to mafke 'room forian'other vehicle',- the level ofthe liquidgwithin the tank xchanges with' reference to the topf and bottom 'of the same" andthe saine"v eil'ect is produced whenan n automobilel runs up or down ayhill orvalley,i during lwhi'chtime the volume of'liqfuid 1n f y thetanlr` is Snot @changed Atfts'uch'tirnes', y however, it his desirable to prevent theiloat Ifrom irisin'ga'nd falling in response tothe transverse notches or slots 20,"21 which y pli'iralitvl` of locking 'levers l26` cop y uantity `or vo umey of*` gasolene` contained within the "tank, Thisv `is `however; the automobile tilts :sidewise variations'injthelevel ofthevr lnltidinfjthe tank otherwisetanfinaccurateor alselreglsjtratlon of gaso'lenewouldfbe producedf'om they dial. mechanisni;i` Forfftlie"*purpose-fof `preventing rotation .ofwtheyspiralanfl Cthe'l i rising andifalling,movement ofthe Hoa tf the car again returns to a' level part offfthe o roadway. The preferred mean" f"` purpose comprise a `locking whee tothe upper end` of th"e"'d1`iving y shaft 15 `so as "tof'ftumftherewith with this locking wheel. fA "Thelatte y erably 'secured at its center toffjtlienpper threaded 'end of5the1"(`lriv`ing'shaftbyneans y t, ofthe screw'nutl'2`7 and itsfmarginalpor'f tion1or periphery'*isA 'beveled andprovi'ded withv anv annular rowot'k teeth "The ing" 16ms "m' "y'in nunmal-Khmer preferable to employ four of them is l n arran 'ed ectluidistant around the llockin, wheehtwo o Vthese levers being arrangedfonif diametrically opposite sides of this wheel y"on a` line i transversely ofthe" automobile andy theother l two on diametrically oppositesideslof..the locking wheel and on a line"arrangedlength wise of the automobile. These levers man` be pivotally supported so ast'oswing" vertically in` any suitable manner' but', asshown in 1f the" drawlngs,` 'these'` levers *arel` pivoted on lugs'29arran ed onbthe-y up erspart' of acas! endant weights' of the several( lockifn evers hold 'the latter ina position invwhic if their jaws are hldfut of yengagenient fro l the toothed rim of mthe lookin wheelj;v fas driving shaft` lfisffree'f'to be' turned 'r the' floaty acting upon the""j"spiral.\ lV' Shawn in Figs. 1 @w24/stehlen `time 13g n either one direction.'oi-theotherlor'"when,` i

lower arm,` moves outwardly under` theiacg-y tion'of the welght thereon, causesthe upp causing the jaw thereo'fftb` engage with t v adjacent'teeth of the locking wheel.i The la'tlterad"thefyparts `o era'tvely connected` therewith` are nowfhe d against"ljotationi*` thereby preventing the Yilloatfuroi'n following"l` the abnormal levelofthe gasolene'whh'is 13"()k iboA produv'ced' thetank -attnistime vand avoidin'gani inaccuratmregistration of the saine motor car or vehicle againjtakesaflevel road the respective 'locking lever; Thcli has been in service is 'fa-gain moved" into its inoperative position andthe driving'shaft 15 and Aspiral are. r'e`leased,jso thaftl-the-salne can be againactuated by the 'float-.l f Ifjany, gasolene yis added vto or subtracted Vagainst vertical motion, "theflsame will immediately operate the dialfme'chanism the 3 0 v. Y. ated;directly' with the driving orf-'Hout haft instant the float is releasechwhen the car again reaches level ground. i I

The forward and backward movement of the driving shaft in response to the rising.

and falling of the float is transmitted by primary ratchet mechanisms to switch mechanisms which are arranged in electric circuits which-include electro-motors for operating the secondary ratchet mechanisms 'which latter in turn operate dial mechanisms preferably arranged adjacent to the drivers compartment, in orde'rto .enable the driver to see at a glance the'fcnditiomof his gasolene supply and the amoun which has been consumed. i "Those vparts of the ratclj'ie mechanisms and fthe electric switch mechanisms as SOCil' 1'5. are'for 'convenience re arded asfapart fof the J float mechanism'-.anv

represents a lower' primary driving wheel and 34 an upper primary driving wheel both of which are. secured, to the driving shaft' 15 so as toVt'urn forwardly and backwardly therewith. These driving wheels are preferably constructed in the form of ratchet wheels, the teeth of the lower driving wheel 33 having their abrupt sides facing forwardly and their inclined sides facin rearwardly while the teeth of the upper riving ratchet wheel 34 have their abrupt sides facing rearwardly and their inclined sides facing forwardly'.v Between the lower and 'upper driving'ratchet wheels the driving shaft is journaled in a cross bar 35 Awhich 1s connected with the bal" 18 and 'forms "art of thesame frame. Below the lower riving ratchet wheel is arranged a lower primary driven wheel 36 which is mounted loosely on the driving-shaft so as to turn independently thereof. This lower driven wheel is also constructed preferably in the form of a ratchet wheel having teeth on its periphery which have vtheir abrupt sides facing rearwardly andtheir inclined sides facin gaged ondiametrically opposite sides of this wheel by means of detent pawls or dogs 37 mounted on the cross bar 35 and operating toprevent backward rotation of the lower driven wheel but'permitting forward rotaforwardly which teeth are en-v avlieel moves forwardly the low'er driven wheel is compelled to turn in the same direction therewith through the medium of -the driving pawls 38 but when the lowerdriving wheelturns backwardly it moves independently of the lower driven wheel.

39 represents an upper primary driven wheel mounted loosely on the driving shaft above the upper driving wheel 34 and provided on its periphery with an annular row of ratchet teeth which are engaged on oppor"` site sides of this wheel by means of detet `pawls o r dogs 40 mounted on the adjacent part of the cross bar 35, these teeth having their abrupt front sides facing forwardly and their inclined rear sides facing rearwardly so that the pawls 40 ,engaging therewithoperate to permitv the upper driven wheel 39' to only turn backwardly and not forwardly. Forward motion is transmitted from the upper driving wheel 34 to the'upv per drivenwheel 39 by means of two spring Y driving or operating pawls 41, 41 mounted 1 on the underside of this upper driven wheel and engaging with diametrically opposite sides of the teeth of the upper driving wheel 34, so that-during the forward'motion of the driving'shaft 15 and the upper driving wheel the latter" will turn forwardly independently ofwthe upper driven wheel but 105 during` the,backward rotation of the driving shaft and' upper driving wheel the upper drivingpawls 41 will compel the upper driven `wheel 39 to also turn backwardly with the driving shaft.- Each pair of operating and zdetent pawls which have been ]ust described and which venf'gage with the teeth,-k on opposite sides of a ratchet wheel are so a-rran ed that one pawl of each pair operates s ightly in advance of the other which prevents undue slack or lost motion between any one ofthe ratchet wheels and its companion pawls without making the teeth unduly fine.

Associated with the lower primary ratchet mechanism is a primary switchv device which during `forward rotation of the lower driven wheel causesan electric circuit t0 be successively openedfandf closed at two different points adjacent to the, ioat mechanism which primary switch device coperates with elements associated withfthe dial mechanism for indicatingthe amount of gasolene which is supplied Ato the tank from time to time for a considerable period oftime, for ini y. mamie iii-ranged relativel t cams arestag ering theamount;` of

v isi on some particiiler icmined` stretch of roadA which 1 y thefmotoi" ,cart -The h jdevi assiatedwith thelower p11- ratchet mechanismeoiiiprises two norlfy Stationary co ct`s` 42 43 which y"are va stationary 'insjiil'atedtv support orfsfndlrd 44 011 the slippltigplte 9 `two yiinoiriible `contacte 45, y46` which are` adapted to engiiged with and lidise'ii'ggaged from the `"fixed contacts 42,' 43, respectively, said ymovvnbl'e contotsbeiigpreferablyfconstructed-ini' b `neitifiicte in the form of screwsv vapiilftfS'O that i auses'ath i t A- similar ciated witjht tering'. .device prii'naryy swtchd ce of Spring metahstripeand each cui-"edy at one ,ehd to* the insulating 4 eoiiipanion fixed: contacts. Each',

incl inedro'nt face and an abrupt" rearl` face,

` solthatwhen lthiscaiii ywheel tiirns'forwardl'i'r f aslindicatedi-by the arrowe'49 in FigsfT, 8-

maiid2-.

e free ndof t e companion mov-` therewith will of rengagement fi l u contact-then `jheldi 'th yposition by` the ooiiceiiti'ic oiiten` face of this cainand then ypei'rtnitted to'rlrop oftfhfi's cam along the rear abrupt. face :thereof and into enizagzeiiientl `ivithvthe `companion fixedfcontact diie tothe resilience of this movable co'ntact. `this opera,-

tioiifbeing,repeated byeacb of the cams of` this ca inA ii'heel idiiriiigf` .the rotary movement adapted" to engage `andfdieengagrethe contacts ofthe companion ysi of `times diiring each: rotation of this` Wheel, the constriictionof the saiiieaas shownin the Vrlraviiiipre.l being such that.y this wheel makes` aiulbreaks4 the respectivecirciiit five tiniesty during each rotation of snid'cam. kThe two `'primariT camjwheels 47. ,48 are identical"in constriiction but the saine are preferably so ,ch for making'` f and"y .reaking the respective circuit a number a bemored toward `aiiel fromy thec'om'palnion t v f fixed;coi'itact,'and` tworotatableprima wheels 47` 48 constructeduof insulati gy v terial and connected withechfiothe'rand with theiiiiderside lofthe lowerdrivenwheel 36, n'dedapted vto shiftosad movable con-v v tactsy iitoand out of engagement with their Y; `driven wheelr 39" so asv `t -`o} tiirn s These twoca'ingwheels'aremountel driving shaft but `turn :independ n hereoffand eucliiof tlieseni'heels@ is n itsyzperipher'y with a; plurality),f`

i sprln each `camovlieel tur i i ptislies'tlie freev en( of he e'epec v able contact oiitward ont, of engagemen y from. the companion dtconvtaet, then lthe i i concentric face of this vcaniretainsthe mov.` able Contact in thisposition and ygwlienthe abrupt yfront face of ythiscam ispreseiitedjtog` i the tree'endof` the movable contact the hitftert. due toits spi-ingo action,l w

ymay be `varied i but` each )'rovided with `cams the craw-1rig'si.i.andy he.

:'wheels "are f stagger sively `or alternatelyv v .ge f 1g 11g the respectivefelectricl" emitche a which 13oL .they are associated and alternately open and close/the electric circuits of which they forni a. art.- f

he dial mechanism which is preferably arranged adjacent to the drivers compartment, where the same is conveniently acces;

sible for reading purposes, constructed as follows:

57 represents an `upright front plate or disk, 58 an upright rear plate or disk, 59 va horizontal longitudinal space bar connecting the lower parts of the front and rear plates 'and 60 an upper supporting plate connecting the upper parts of thefront and rear plates, which parts together form the main niembers of the frame which support the working 4parts of the dial mechanism.

In vrear of the upper left hand part of the front plate is arranged-the means for registering the amount of gasolene or other liquid which is supplied to the tank 1. This indicating device may be of any suitable or well known construction but as.

shown in the drawings the saii'iecomprises a plurality of indicatingor 'dialwheels 61,62, 63, 64 which are arranged axiallyside by side .and each provided on its periphery with an annular row ot' numbers running from naught'to nine which are visible through an opening 65 in the front' plate, the numerals of the first wheel 61 indicating units,` the second wheel 62 tens. the thirdA wheel 63 hundreds and the fourth wheel 64 thousands. These wheels may be Voperativelyconnected with each other ingany suitable 0r usual manner for-.causing the tens wheel to be rotation at the end of leach complete rotation of thev units wheels and ,each succeeding higher wheel to 'begin like manner turned forward one step or member at the end of each rotation 0f tlie next lower dial wheel. 'Inasmuch as various well..kn'own means may be employed for thus carrying up from each lower dial wheel to the next higher dial wheel no detailed description or illustration of the same is here deemed necessary, it be?.

ing siitlicient for the present purpose to showv the coperation of the present improvement with the, units wheel of this indciating de? vice. l

66 represents a horizontal arbor or su t ve porting rod arranged transversely above upper plate 60 and in rear of the upper part of the front plate and supported at its oppo site ends in brackets 67, 67 project-ing rea wardly from the'front plate, as best sho in Figs. 14 and 15). On the left hand pait4 this arbor is rotatably mounted a tiibul'a'il shaft orfsleeve 68 the outer or left hand end g of which is provided with a gear wheel 69 which meshes with a gear wheel 70 pivotally mounted at the' left end of the set of season dial wheels 4but connected with the units dial wheel of this season indicator, in any suitrock lever this cam f able manner. To the left hand end of this tubular shaft 66 is alsosecured a Aratchet wheel 71 the teeth on th eripliery of which are adapted to be engaged successivelyT by the nose or hook 7 2 Iof a pawl 73 which is ar ranged above'thisyatchet wheel, so that upon moving this pawl in one direction with an operative 'stroke-its nose will engage vthe a rupt face of one tooth on the ratchet wheel 69 and turn the same one space and during the return movement of this awl in -the opposite direction its-:nose will lie advanced preparatory to engagingl the next following tooth of said ratchet wheel.A This pawl'is pivotally connected at itsrearj--end with the upper arm of a rock lever 7 which latter is pivotally mounted for verti. scillation' on the rear side of the reaiffplate-,of the mainV frame of the dial mechanism fBetween its .frontand rearends the pawl 73 rests upon a shoulder, bracket or support 75 of the main Y 3. kOn its underside th-'pawl is provided midway of its length with a cam face 77 whichais so constructed that when thev pawl ismovfedwith an op rative stroke by.- the to descend and enga tooth or nose with 'heel 71 and turn the same one space and during the last portion of the idle return movement of this pawl its cam face by engagement with. the shoulder 75 of the main fraifne .will be again lifted so that its nose is raised above the path of the turned .forward one space or oiie-tenth of teeth of the. ratchet wheel.'

Il permit this pawlA The rock lever 71E-is turned backwardly t0- getlier With.the actuating pawl 73 by means of a spring 78 connecting the upper arm of this lever with -the main frame and the forward movementiof this lever is produced by an 'electro-motorl comprising an 'electromagnet havingits {,coil"'I inounted on the i lower left hand partfofxthemain frame while its )ole is adapted'toiattra'ct an armature 80 an a solenoid core 8- 1 which areoperatvely connected with the 'lower arm of theflever 7 3. Upon energizing the coil1'79-this armature and core are moved forwardly whereby the rock lever is turned in the direction for moving the actuating pawl into engagement with the teeth ofthe ratchet wheel 71- and turning thelatter one space while upondenergizing this coil the spring78 operates to move these y parts in the opposite direction.

The rotation of the tubular shaft 68 is i'tif' .lized to or erate a secondar switch device which causes electric vcircuit containing the coil 7 9 and an electric generator S2 and the switch contacts 42, 45, 43, 46 to be opened i and closed-alternately at intervals at a place adjacent to `'where the dial mechanism is located. This secondary electric switch mechanisni comprises two fixed contacts 83, 84

l bFromthis it will be seen'that thc battery f which `prefesrahly arci constructed in theforin` t of, screws mounted"onfthefbracket 75 of thef hollowehat 68 so 'as to turn therewith and `7D adapted to operate; the movablecontact's 85,l

86,1128 CCLiYely. `Each of thesecaln wheels is' i 15` provi ed on-its peri hery with a. lurality of` cams each of whic has an inc ined-'front face,` azcon'centric outer face and any abrupt rear face so that"uponturningA this wheel w each ofvits'cams iin/turn will engage its in- 20 clined front face with the `free end of the f movable contact ofthe" respective secondary switchland move the same outwardlyinto ensgagement with the companion fixed contact,

the gummi@ face of this am wiuholdthe y"movable contact in engagementwith said yfixed contact and then the abrupt rear face -of l this cam `during:the continued -fol'ward movement'.` thereotwill `permit the movable spring `Contact to-dropfrom the high con; y centmclface of thiscam down 'to the inclined K'face oflthe next followingcam and thereby bl'eakfthe` connection between` thisymova'ble contact :jand its` companion` fixedcontact.,

vwheels may be' varied but itis preferable tot "l employfivejwcams oneach ofthese wheels, as shown in thedrmvingsl The cams of the two secondnrywheels-S?, '88 are stagy ered yor yi90 arranged that thegcams ,of one W leel are one 'stepforspace ahead ofthe camsy of the v`other `wheels so that they open and close the Secondary switches and the electric circuits ivth-wlnch they are-associated alternately;

` As-shown in the diagram Fig. 23, the two f movable `contacts 45, 46 of the primary switches associated `with the" lower driven disk 36 are connected by a wire 89 with one Side ofthe battery or electric generator 82,` l

the fixed contact-S48, 42; of these `switches are connected bywiresQO,y 91 with the fixed l *contactsf 83, 84 y of the secondary switches whichfareoperated by the cams 875 88 on the shaft'76(9),` the opposite side of the battery is i connected by a wire 92 with one end of the coil mand the otherend of thiscoil is cony"`n,c`ted` by a` wir-e593 with the movable conthe switches .associated with `theshaft68. 'f i i andthe electro-motor coil filare arranged "in ytvkvo adding electric circuits 'one of which contains thecontacts 42, 45 of one-primary woatswitch!and' the contacts 83, 85 of one i :secondaryfdialswitch `while the other convftans thefcontacts 43,146 of theotherprimary "UTh'e number-"of cams oneach -off these cam y35 .tion so that ,the cam wheel contacts 84, 860i the dial tioned circuit still open by reason" `of* th float switch and the contacte`w84 `86l ofthe other secondary dialswitch* V `ssuming tliatthefpart tion indicatedy in F` 2 N y tacts 43,46 of one `oat" switchareengage and `the contacts`8l,` 85V ofthe companion dial switch" areopen, While` the contacts`42 420i? the' other float switch are rseparat and the contacts;84,` 8o offthe companion dial switch are engaged*l both'offthese .cuits including the batte 82 aridfthe coi are yfbroken, one "at theld'oat"y lswitch `mec anism andthelotherat the dial switch' mec anism, so that no currentat thistitne'o through eitherv of these' circuits; If now 4float rises inthe tank` dueto-nn additi thereto of gasolene boththe'iioatc f 47, 48 will be turne medium of the` spi l and associated par turning movement: these cani wheels thi-sdirection iss11flc`ien't-to` cause the yf able Contact 45 "of the lower primary "switch to dro off the respectve'cain"andlto 4engagedl with the companion? 42, and the movablecontact 46o oat switch to be` ovedf ontw wire 89` to the opposite side lofgt The instant this occursthejcoilf79 energized and attracts' the ysolenni armature 80,81, whereby the rock is` turned `forwar,

on this total or season indicator," ing ofthe sl1aft'68` also'causesthe' ti wheels 87 i 88 to: be ro ,d inthe justV been included inlyfthe contacts 83. 85 of theotliex` d cli' z e v engaged b vtllc calin wheelland heot circuit ofy the coil"79 'and `batte* closed nt this pointalthougflithisln'stf'me` .same having previously been Vbroken by the separation of the contacts 43, 46 ofthe companion'float switch due to the rising of the float. As the float-'continues .to rise and turn the float cam wheels 47, 48 in the same direction the contacts 42, 45 will be 'again opened and the contacts 43, 46 closed .so that an electric circuit of the battery 82 and the coil 79 is again closed at which time the current flows from one side of thegbattery through the wire 92,'coil 79, wire 93, contacts 83, 8,5, wire 90, floa'tcontacts 43, 46 and wire 89 to the opposite side of the battery. The instant this occurs the energized coil 79 again attracts the solenoid 81 and armature thereby causin'gthe rock lever 74 to move the pawl 73 and again turn the ratchet wheel A7l forwardly one ysplice, thereby causing the total or season-"register to add one. more number thereto'.v thefsame time the turning of the shaft 68 and the cam wheels 87, 88 with theratchet wheel 7l causes the contacts 83, S5 of the dial switch which has `justbeen active to be separated and the contacts 84, 86 of the other dial switch which has previously been inactive to be engaged, so that at this time both circuits of the battery 82 and the coil 79 are again broken, due to the openingr of one of these circuits bythe separation of the contacts of one float switch and f the separation of the contacts ofone dial switch in the other circuit.

It will be apparent from the foregoing `explanation that the closing of one or the other of the two circuits or branches of the battery .82 and coil 79 is always effected preliminarily by,v one or the other .of the float operated switches which .are located adjacent to the gasolene tank but that the breaking of these'circuits occurs successively by the dial switches adjacent to the drivers compartment due to the action ofthe coil 79. It is well known that sparks in an electric circuit of this character are only produced by the separation of two contacts of a switch ina live circuit and it follows from this that no spark is at any time produced between the contacts of either of the float operated switches because the contacts of each of these switches are always opened by the rising of the float during a time when the contacts of the companion dial switch are separated so that no spark can occur adjacent to the gasolene tank. By thus proriding two electric circuits for operating the dial mechanism from the movement of the float, the current flowing in the live circuit first operates the magnet and then immediately shuts off the current, but leaves the partsiu such condition that the other circuit will become alive when the float-has risen sufficiently for this purpose. If the current were not shut off promptly after the dial mechanism was operated there wouldv be needless waste of current and in -cont-acts of the seconda Jcase a battery was employed as a source of,

energy the same would soon run down, and in addition to this the contacts of the switches would `be liable to heat unduly and v possibly melt and also burn out the coil..

It is desirable to closethe electric switch quickly and firmly Iadjacent to the gasolene able contacts relative to its companion contact. ,This objection is avoided by causing the members of each of these pairs of contacts to become engaged by-causing the movable contact to drop suddenly from the salient part' of a cam to the companion fixed contact so that circuit is closed quickly and reliably as in a snap switch, otherwise obp jectionable sparking or arcing might be produced. y The breaking of the circuits at the dial mechanismshould occur suddenlyy so as to avoid undue sparking or arcing between the i switches. These conditions are fulfilled 1n the present organization inasmuch as the primary switches are so constructed that they close the circu-its uickly and open; the `same slowly while t ese circuits have already been openedby Y the secondary switches, and the last mentioned switches open the circuits quickly and close the same slowly at a time when the respective` circuits are'. opened by the primary switches. It istherefore impossible for any spark to be-produced by the switches which are located adjacent to the gasolene tankv and..n0' explosion can occur `which otherwise would endanger the v'safety `of the passengers or the 'motorcar". The dialer secondary electric switches are arranged so far from the gasoleneitank that any sparks produced between the contacts thereof 4upon rotating the secondary .cam `wheels 87, 88,

will be unable to ignite the gasolene vapors,

so that this device .can be used with perfect safety on gasolene'operated automobiles or other installations.

Above the supporting'plate 60 and in rear of the upper righthand part ofthe front plate 57, is arranged a registeringl device which is adapted to be operated by the descent of the float in the tank and register the amount of gasolene orf other liquid which is withdrawn from thevtank during a predeterminedperiod, say during a certain trip or while running themotor car a certain distance or over a definite stretch of road. This trip indicator may also be constructed in any suitable or wellknown manner but as shownin the drawings the same comprises a plurality of dial wheels 94, 9 5, 96 which are arranged axially side by side and provided on their periphery with nu- Y portion of veachjrotation of theo-tens dial' l wheeh The means whereby the numbersgare,

to thou next mera-ls running;- ,from naught to nine exposed 1 through any openinglf? "ini-the upper left f hand partgfofgthe" inlfigzsg 1*. 2 and 1i front fa r are lnolnited upon a 1s `journaled@` horizontally in suitable bearings pro- I Q jecting t rearwardly from the fronty plate. l -fUpon the right` handrpart rofthis shaft is4 10` connected wit f trip register ingr ther last p 'unlts` wheel 9 tnt-ned forward y "numnted nu initial gear ywheel 99 which is 'tion Ofeach rotation "1' lthe he tens dial Wheel :l5 1s 'iswturned forwardly onestep during` the last Ther wheel Imay ,bev` `ofany Suitable rcharacter and as `the samefforni` no part `ol thie` imjention further description relativethereto is deemed unnecessary.

100 represents a hollow shaft mounted on .i theright hand part of the arbor 66 andfhav- ,t ingjsecured thereto at its righthand end an l operatinpr fra videdl on its each of'ivhich l ,as anabrupt frontface and a rerfincliued', ace. `Above this ratchet" wheelx is,A ari-ang d an operating pawl 102 Y.

"which pro ,i at its yfront end `with a njose 103 adapt to engage with one oranotherztooth of the ratchet wheel 101;l lhe rear end of this pawlispivotedto swing l f vertically on vthe. upper arm of a vertically swinging` rock lever 104 whi'chis -pivotally` y"supported on the rearsideof therear yframe plate 58 so `'that upon rocking thisflever the "actuating'pawl 102 .will be caused' to move "fforwardlyrjand backwardlyfrelative to the tripa` dial; mechanisln. Between its `ends the actuating paivl l102fis provided on its under-` fside'with afcam face 105 `which ridesupon a i shoulderoribearing faceformed on theupper edge of theadjacentl,bracket 75` andlwith `which the sailireis` vielydinglyI held ilnengage, l nlentyby means of aspring` 106 connecting `the upper arm of the rock lever-,104withthe` l actuating p'WllOQ, as shown in Figa.` 17- and 18.` Duringthe advancing` or operating` i ,tornovementf of the vpawl 102 its cam lface l1051riding!,onfthe bracket permits the `Sameoto'deecend and engage an adjacentv o tooth` gofffthe1 ratchet Wheely 101 but'lduringl Hthelast portion ofthe return or idle ymov`e` mentltliils pawl is elevatedby engagementof" i itscam aprface 105.y with'thebracket` .75 so [tllattlie of thispawl is lifted abovetheI fpathy of tlieteeth oiggthe ratchet wheel. 101, as) Sh'OWIVD awl "ie soldetermined that plate` 5T, as shown "several dial wheels` n n one-tenth of al ruation,` i in likelnlanner theV hundreds dial wheel 9G -roln each lower" dial ,wheel `gear Whee1'11'2 which? meshes with the initial het wheel 101 which ,is proriphery withratchet teeth l `while turning. this l" i,:operatiiigstroke yof this *pawll the same moves the lyratchet Wheel 101y fori Ward one tooth or space.` Theoreturn `movementgof the rock lever and the actuating o pawl connected therewith is "eifeloted y by means of` a spring '107 o connecting. the upper o arm of this leverfwith the bracket75.,y The operating movementof these: parts? is produedby an electromotor .the electro-mag"- `netic coi1108 of which is mounted horizon# main` frame and adaptedfvto attract i olenoid core 109 andan armaturellO Whicl atively connected with the loWfenarm-ofgthe f rock` lever 104,' v17, island 23.

y `s shown in `14, 15,

is securedv an intermediate ratchet Wheel 111 .having the teeth onits periphery so con` ,y yso To the l`innerside ofthe ratchet wheelilOl ,strjucted thateachtooth has its abrupt, side .facing rearwardly and the inclinedvr side thereof facing forwardly.; Arranged between theactuatingratchetwhechlQl and inter-l` ,inerfliate ratchet wheel* 111 is an intermediate gear wheel 99` ofthe trip indicating` device, as shown in F ig. 19, and which is' jolirnaled on ythe .hub of ysaid intermediate ratchet wheel, as shown in Figs. ,19 and 22," Onthe inner side oftheinteri'nediate gearv wheellll the same fis providedwith ay coupling `pawl ylltwhichv-is pivotedthereto and yieldngly held with itsknose in engagementQWth oneor` another v of the teeth of ,the intermediate`` ratchetk wheel k111 by means` of a spring 115 I t arranged on` the intermediate, gearllwheel and. bearingL against" kthis coupling ypand,jas o shown in Fig; -17.k Bymeansbf this connec-- ,tion between the intermediate gaat` wheel i "112" andthe register gear ,wheelllrthese o l v two gear wheels y'are,zcomlwlled.tor tatef'toqof gather when the interniediategeafriv eel1112` isl "turned by engagement'l ofy the'4 actuating*` f pawl 104. I`with the; actuating yratclgiet;y wheel 10h but when it is desired` topturn thewsev independently ofv itsyactuating device, ity ispossibleto do tliisnivithout disa'rraligingI t of the, float `in the-tank ThisLturllling,tofiy Zero ofthe several dialwheeleof, the `trip register ma)r be e'ected'by means of-a finger piece 1161operativelyy connected, with l`the ytrip dial wheels in anv, suitable manner, and

nger piecen fofl'ivardly` l untilall the trip ,dial wbeelsarefin, zero positermediate gear'wheel 112`to turnj-forWardli,v

,111. .duringv "which movement of vthe interv" yindeperaenny. of the ratchet wheels' 1:01 man mediatev gear Wheel 1121 Lit-s pawlw 114 l trips idly` over theclteetli,of ythis intemnedif the, reciprocating movel :ate ratchet xivheel v Backward,rotationtgof the gearwheels] y112,@511B-is vented by.

a detent pawl 200monntedfonfthediallfruine. @,139 f eraly dial wheelsiof the trip register to'zero,1110L to make a notation of the condition of its dial at the end of one season and the-Abegi'nl nirlig of another season.

ergizin and denergizing of the coil 108 of the e cetro-motor which operates the trip register is effected during the descent of the loat in the tank b f utilizing the motion of the latter to periodicall open and close electric circuits vwhich inc ude the coil 108 and the battery 82, also the contacts 50, 52, 51, 53, of the primary alternating switches mounted on the upper end of the float driving shaft 15 and also a secondary switch mechanism associated with the hollow shaft 10O'ofv the trip registering mechanism. This secondary switch mechanism comprises .two normally fixed contacts 117, 118 which preferably consist of adjustable screws mounted O on the bracket but insulated therefrom and two movable contacts 119, 120 which are preferably constructed of strips of spring metal and are mounted at .oneend on the bracket A7 5 but insulated therefrom while their opposite free ends are adapted to be engaged with and disengaged from the fixed contacts 117, 118, respective] Y. 121, 122 represent two rotatable cam W eels which are constructed of insulating material and `mounted side by side on the tubular shaft 100 so as to turn with the same and the intermediate gear wheel- 112 and ratchet wheels 101, 111, as shown in Fig. 19. Each of these cam wheels is provided on its periphery with an annular row of cams a a ted to engage with the free end of one of t e movablecontacts 119 or 120 for the purposeV of `intermittently moving the re-` so that each cam inturn engages the free spective contactl into engagement with its com anion fixed contact 117 or 118. lEach ofv tiie cams of oneof these cam wheels is provided with anl inclined front side, aconcentric outer side and an abrupt rear side end of its companion movable contact and moves the same'into engagement with the companion fixed contact and then allow this movable contact to move inwardly past the abrupt side of this cam due to the resilence of this contact and thereby disengage the latter from its companionfixed contact. They cam wheels 121,122 are so arranged relatively. to each other that their cams are staggered or in other words the high faces of the cams of one wheel are'arranged opposite the low faces of the'cams of the other wheel.`

The movablecontacts 52, 53 of the primacy i with thetwo fixed contacts 117, 118 of the secondary switches of the trip registering mechanism. The opposite side of the battery 82 is connected by a wire 126 with one end of the coil 108 and the opposite end of this coil is connected by a wire 127 with the movable contacts 119, 120 vof the secondary trip registering switches. It will be noted that by this means two electric circuits or branch circuits are formed each of which includesa primary switch at the gasolene tank and la secondary switch at the drivel-s station or other place remote from the gasolene tank, and during the 'operation of these switches these two circuits are opened and closed alternately so that the batter Y 82 and the-coil 108 are alternately include in these 'iov circuits and the coil is sucessively energized and denerglzed. VAs shown in Fig. 23 the f contacts 50, 52 of the lower primary switch of the trip indicator are engaged, the contacts 51, 53 of the upper primary switch of this mechanism are separated, the contacts 117, 119 Vof one of the secondary switches are engaged and the contacts 118', 12() of the other companion secondary switch are disengaged. When the parts are in this position the circuits through both pairs of these pru'nary and secondary switches are broken and the coil108 is denergized. When`the fioat descends a predetermined distance due to the removal therefrom of a certain quantity of gasolene or other liquid both primary cam wheels 54, 55 are turned back wardlyin the direction of the arrows 56, in Fi 23, which causes the cam wheel 54 to shlft the movable contact 52 out of engagement from theixed contact 50 and the cam wheel 55 to permitqthe movable contact 53 to engage with the fixed contact 51. When this occurs the current passes from oneside of. the battery 82 successively through t-he wire 126, coil 108, wire 127, movable contact 119,

fixed contact'117, wire 124. fixed and mov-' j 115; l

able contacts 51 and 53 and wire 123 to the" opposite side of the battery. No current-can, however,pass through the other companion r `circuit by reason yof the Samebeingbroken by the separation of the primary contacts 5052 and the separation of the secondary ,contacts 118, 120. Owing to the closing 'of the circuit which includes the primary contaets 51, 5() and the secondary contacts 117, 119, the coil 108 becomes energized' and immediately causes the two secondary cam wheels 121, 122 to be rotated in the direction of the arrow 128 through the medium ofthe ratchet mechanism associated with these parts whereby the circuit ofwthe battery 82 and coil 108 is broken by yreason of the movy ther gear rim 134 on the right hand side of ated for -indicating substraction from the gasolene .supply, this forward and backward movement of the 'tank dial wheel correspending in measure to the addition represented by the season register and the subtraction ofthe trip register. The forward movement :of the tank dial wheel 'is eected by means which comprise an. adding gear wheel '133 mounted loosely on the left hand end ofthe arbor 6.6, as shown in Figs. 19 and 21 and meshing Vwith Aa gearV rim 134 formed on the upper edge ofthe dial flange 131, and a `ratchet wheel v135 secured to or formed on the inner yside of this I.gear wheel 133.30- as to turn therewith. The vratchet wheel 135 is arranged close to the outer side of ,the ratchetl wheel 71., 'these two ratchet wheels being identical `in 4construction so far as their diameter, form and number ofl their teeth are :concerned :and the corresponding teeth of both these wheels being arranged in line and ,facing with their abrupt sides in one direction fand .their inclined sides in the opposite direction.

rlvhe arose 72 lof the adding pawl 73 is so arranged that ythe same straddles both ratchet wheels 7:1, and during the operative stroke of this pawl its nose engages the vcorresponding teeth of both of these ratchet wiheels and turns the saine simultaneously, thereby causing a forward or addr.

tional movement of the season register and a forward or additional movement on the tankregister which correspond in amount to the i volume of liquid which has been added to the tank. At the end of the return stroke` 1 of this actuating pawl the nose 72 thereof is lifted clear not only of the teeth of the season ratchet wheel 71 but also of the tank ratchet wheel 135, thereby leaving the tank dial wheel free .to be turned backwardly independently of Vthe actuating pawl 73 and associated parts,A when -'this is necessary.

' 136 represents a substracting gear wheel mounted loosely on the right handl end of the arbor 6G and meshing with the teeth of the axis of the tank dial wheel, as shown in Figs. 18, v19 and 22. On its inner side the gear wheel 13G has secured thereto a ratchet wheel 1137 which turns therewith and is arranged ladjacent to the ratchet wheel 101 mounted on the right hand end of the tubular shaft 100. These two last mentioned ratchet wheels also correspond in diameter and in the number of their teeth, and the teeth `of both of these ratchet wheels are so arranged that corresponding teeth are arranged transversely Yin line and all of their teeth have their abrupt sides facing in one direction and their inclined sides facing iii` the opposite direction.

.The subtrac [ng pawl 102 is arranged with its `nose 103 so that the latter straddles the 137 so that the ytank level dial wheel is free to be turned independently of the subtracting pawl by the adding pawl and' associated parts.V L

It will thus be noted that the tank level dialwheel when at rest is operatively disconnected from both the adding pawl andl the vsubtracting pawl but is capable of being turned forwardly on one side of its axis by the adding mechanism independently of the subtracting mechanism, or backwardly von the opposite side of its axis by the subtractn ing mechanism independently of the adding mechanism. From the foregoing lit will now Y be clear that whenever .the [loat rises in the tank due to the addition thereto of Vgasolene or other liquid the season register will be operated to add thereto an amount equal to the amount of gasolene which has been added to the tank and at the same time thetank level dial will be advanced so as to indicate the quantity of gasolene or liquid which lis on hand in the' tank, but when the float descends in response `to the consumption of gasolene which is removed therefrom the trip register will be operated to indicate a corresponding subtraction of the gasoleiie from the tank while the tank level dial will beiturned backwardly so as to /indicate a corresponding decrease in the volume of gasolene on hand.

In the absence of any provision topi-event it the quick operation of the electro-motors on the various registering. devices is liable at 1 times to overthrow the same and thus produce an inaccurate showing of the same.. To avoid this retarding devices are applied yto the tubular shafts 68, 100'of the season and trip registering devices and also to the disk of the tank registering device. TheV retarding device for the season and trip registers preferably comprise two brake bands 138 of spring meta-l which embrace the inner ends of these tubular shafts and each of which rests lat one end on an acentabutment 139 forming part of the frame of the ap aratus while the other end is connected with this abutment by means of an adjusting screw 140,- as shown in Figs. 14, 15 and 19. By

tightening the screws 140 more or less a sufficient frictional grip may be produced by l` Ithe-brakehands 138 on these tubular shafts `so.thiiittheywillibe ableto turn under the ofthe'lo eratingmeehanism asso-` ciated .therewith "suringia proper s owing of the season and `trip y registers in up response to the y risingy and fullingvofthe float in the tank.r

diie-ed;onv the tank level registercomprises an annular row iifronieal openlngsorfre- ,:esseslll"formed on the upper side of the i pawl`142 adapted to engage with one or the thereof, a-braeket 113 depending from i the.

` y atitsulower end with a guide pocket 11i-.L`

arranged in this pocket and bearingr atits i upperendvagaiiist" the bottoni` of the same and `at its voliiposite endagainst thev top of the gagenient with `one or'` the other of the re taining reeesses "The` pressure which the spring'exerts against vthe detent `pawl when the latti'rrengages one ofthe reces s 141. 3i; sulijeient to prevent acf oidentaldisl'ilaeeinent of the tank level dial I y turned either ft'orwardly or liackwardly by tlieadding 'or subtracting mituating mecha'- "`nisin.f Afsuiiieieiit number of recesses 1&1 are @provided to hold the sainein position aftereaoh operation of one or theother of the actuati ng devi i It; to "he llinde `)od that in the manufai'itifire of thisapjiaratusthe movement of the float and the'extentvof the rotation of` tlicfsliiiral prodi. 'ed b v the rising` and fall-y ingoftthefioat s `calilzirated to represifmt a" 'iond to, the volume of f liquid `which isireiiresentiid by therisingai'id V falling of the tloatwithin the tank. *A gallonihas been adopted `as a eoiii'enient standard "of ineasurement for thisk purp and eat-hlnuil'ieralfon the season, trip and tank i registers is `tlierelioreyequiralent to gallons.

llie'tank wheel has been coi "a maximum of. 3:4 gallo e i pli e rotation of thesan'ielinit it is tohe undei vod thatthis can be varied it" desireiil.

Whisi improved apparatusifor registering liquid is positirexin its actioni and furi'iishes areliable and accurato taten'ient of the total a'mountlof gasolene used C during a season as "well asioii nie*partieular trip and also the "aiuoui'ito gasoleneor liquidremaining in` fthe; tank. so that an accurate computation during a corn- 1,2sigaia l ut the' same WillUbe pre-` yventgla'd from bein "overthrown, thereby in-` [Thfe means whereby this saine effect is pro-g l n g *lute security against,ignitionfof gasolene iliskmoflthe tank'level dial wheel;` a detent otlier of theserecesses from `the upper side` undei ideot the top plate 6() and'` provided which Areceivesthis ball, and a spring` 1115k i ball forfliolding the ylatter yieldiiigly in en-r y 141 ofthe tank dial wheel.-

wheelbutyields freely when this wheel isy is associated therewith. by the fallofvthe sainetwo electric switches,

certain volui'ne of liquid iny any.particular` "truetiu'l to regcan `be malle. suel'i as the cost of fuel for opi erating ainiotor car for anyperiodof .f l V and the operator canl also readily determine car equipments as now generally constructe,dfy

and without undue expense,

a spark yadjacent to thegasolene tank abso# vapors assured, thereby rendering the use of this recording devicel perfectly safe `andi witl'iout endangering thesecurity of the car yor its passengers. f

n Te `c dini as our invention:

l.` An indicating mechanism for liquidf tanks comprising a'ffioatfadapted to rise and fall with the change in they level-ofthe liquid lin a one of which tank, twot ratchet mechanisms is moved effectively by the rise "l of said float and the other being movedef i fectively by the fall of the i saine and two registers one of` which isl operated blyuoneA t. of said ratchet i'nechanisn'is `and adds vwhen the floatA rises whiletheother is operatedby" the other.ratchetmechanism and subtractsy u when the float de ends i y y i 2. An indicating mechanism` for liquid tanks comprising-i` a tloat` adapted to riseand` fall with the change in the level of the liquid iny a tank, two ratchetfinecl'ianisnis .one of` A` which is moved effectively bythe rise of said: 1 -i float and `the other l'ieing moved effectively one ofwhieh isl opened and closed b vione otsaidratehet inechz'inisnis and the^`o`ther` being oliieiiedfaiid elosedby the other ratchet mechanism and twolregisters onev of which kis-ope'rated by one of' said ratcl'ietinet'hanisms and-adds whei'ir the Hoalt .ril wliilethe other is operated by the other ratchet ineclianism and suliitiacts when the float i'lescends;`

3. An indicating mechiinism i for liquid tanks comprising a`floatadaptedr to rise and fall withthe chi'mgein the levelofthe liquid in a tank. a spiral which is o. :illateiil by said float during it: rising andifallinginiovenient,` a `driving shaft eonneeted with said spiral, two 'driving ratchet wl'ieels securedto said shaft and one having;r tl'iefabrupt;sides of its, teeth facing forwardly and the"otherfliav#` ing the-abrupt sides'of its teeth facing Iback- `wardly. two driven ratchet whee r mounted loosely onfsaid shaft and one having f the abrupt sides of its yteethfacing forwardly i and the other having tlieabrul'it siiileslof its teeth facing backwarcllyy operating [pa'ewls` arranged on each drivei'iratchet wheeland engaging with the teeth of oneoiy the driv-` a relatively stationary part and engaging with the teeth of sauldriven ratchet wheels 125 f ing vratchet wheels. detent pawls arranged on p i erated by the other ratchetmechanism and4 and two registers one of which isoperated by one yof said ratchet mechanisms and adds when the ioat rises while 'the other is opsubtracts when the iioat descends.

4. lAn indicating mechanism for liquid tanks comprising a float adapted to rise and fall with the change' in the level of the liquid in a tank, a spiral which is oscillated by said loat during its rising and falling movement,

a driving shaft connected with said spiral, two driving ratchet wheels secured to said'v shaft and one having the abrupt sides of its teeth facing forwardly and the otherv having the abrupt sides of its teeth facing backwardly,`v twov driven ratchet wheels mounted loosely on said shaft and one having the -abrupt sides of its teeth facing forwardly andthe other havingthe abrupt sides of its teeth facing backwardly,I operating pawls `arranged on each driven ratchet wheel and engaging with the teeth of one of the 'driving ratchet wheels, detent pawls arranged onv a relatively stationary Vpart and y engaging v with the teeth of saidl driven ratchet wheels,

two rotatable cam wheels each turning with one of said driven ratchet wheels, two elec? tric switches veach having a normall fixed contact anda movable contact adapte to e-ngage the companion `fixed contact and actuated by one of said cam wheels and two registers one of'which is operated by. one of said ratchet mechanisms and adds when f the float rises while theother is operated by the other ratchet mechanism and" subtracts when the float descends.

5. An -indicating mechanism for liquid tanks comprising a float adapted to rise and fall with liquid in a tank, two cam wheels operatively connected with said float so as to be turned by the verticalv motion of said ioateachof said wheels having a plurality of -cams and the cams of both wheels being staggered relatively toy each other, and two electric switches each of which has a fixed contact and a movablecontact which is mov# able toward and from its companion fixed contact and which is actuated by the cams ofone of said wheels.

u 6. An indicating mechanism for liquid tanks comprising a oat adapted to rise and fall with the change in the level of the liquid in a tank, a s iral which is oscillated by said float during its rising and fallin movement, avvdriving shaft connected wit said spiral, two driving ratchet wheels secured to said shaft and one having the abrupt sides of its teeth facing forwardly and the other having the abrupt sides of its teeth facing backwardly, two driven ratchet wheels mounted loosely on said Shaft and one having the abrupt 4sides of its teethv facing forwardly and the other having the abrupt sides of its teeth facing backwardly,

operating pawls arranged on each driven onevof the driving ratchet wheels, detent.

pawls arranged on a relatively stationary part and engaging with the teeth of said 'driven ratchet wheels, two pairs of rotatable cam' wheels each pair turning with one of said driven ratchet wheels, two pairs of electric switches each of which comprises a x'ed contact and a movable contact adapted to engage said fixed contact and actuated by one of said cam wheels andtwo registers one of which is operated by one of said ratchet mechanisms and adds when the float rises while the other is operated by theother ratchet mechanismand subtracts when the float descends.

7. An indicating mechanism for liquid tanks comprising a float adapted to rise and fall with the change of a liquid level lin -a tank, a registering device, and means for operatin said .registering -device responsive to t e rise and fall of said ioat vcomprising an electro-motor operatively connected with said registering device and having a coil an electric circuit including saidlcoil and a source of electricity and having two branches, two primary switches actuated bythe movement of saidy float and arranged respectively inl the `branches .of said electric circuit, and two secondary switches arrangedV respectively in the branches of said electric circuit and operated by said electro-motor, said switches be- .ing so organized that the initial opening of the electric circuit is effected only by one or another of said secondary switches and the initial closing of this circuit -is effectedl only by one..or another of said primary switches.

8. An .indicating mechanism for liquid tanks comprising a float adapted to rise and fall with the change of a liquid level in a tank, a registering device, and means for operating 'said registeringdevice responsive to the rise and fall of said float comprising an electro-motor operatively connected wit .psald registering device and having .a coil,

an electricy circuit'including said coil and 'a source of. electricity and having two branches, two primary switches actuated by the movement of said ioat and arranged vrespectively in the branches of said electric circuit, and .two secondary switches arranged respectively in the branches ofsaid electric circuit and operated by said electromotor, said switchesbeing constructed to open and close the branches of said electric c1rcu1t alternately, said switches being so organized that the initial opening of the electric circuit is effected only by one or another of said secondary switches'and the initial closing of this circuit is effected only by one or another of said primary switches.

9. An indicating mechanism for liquid Vtanks comprising a float adapted to rise and 

